Two-wire power and communications for irrigation systems
US8497597B2 · kind B2 · utility
11Cited by
15References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2012 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Sep 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/25132
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A two-wire power and communication system is provided, having a decoder that draws a constant amount of current for communication signals despite changes in the voltage on the power and communication wires. In one example, decoders have a constant current sink circuit that includes a shunt regulator that controls a field effect transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.